Finding the Fourth Proportional to 31,385.43, 43,311.69 and 18,810.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,385.43 : 43,311.69 = 18,810.18 : x
2. Step 2: Convert to fraction form
   31,385.43/43,311.69 = 18,810.18/x
3. Step 3: Cross multiply
   31,385.43x = 43,311.69 × 18,810.18
4. Step 4: Simplify right side
   31,385.43x = 814,700,685.00
5. Step 5: Solve for x
   x = 814,700,685.00/31,385.43
6. Step 6: Final answer
   x = 25,957.93